Combined friction and positive clutch.



` A. L. HALLBAUER COMBINED PRICTICN AND POSITIVE CLUTCH.

APPLICATION FILED JUNE 28, 1913.

1 ,098,148. Patented M3326. 1914.

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A. L. HALLBAUER.

COMBINED PRICTICN AND POSITIVE CLUTCH.

APPLICATION FILED JUNE 28, 1913.

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ALBERT Il. HALLBAUER, OF TAMBA, FLORIDA, -ASSIGyNOR T0 PALMETTO MACHINE COMPANY, INCORPORATED, OF BALTIMORE, MARYLAND, A CORPORATIO OF MARYLAN D.

COMBINED PB .ICTION AND POSITIVE CLUTCH.

Specication of Lettersv Patent.

Patented May 26, 1914.

Application tiled .Tune 28, 1918. Serial No. 726,377.-

To all whom it may concern Be it known that I, ALBERT L. HALL- BAUER, a citizen of the United States, residing at Tampa,I in the county of Hillsboro and State of Florida, have invented certain new and useful Improvements in Combined Friction and Positive Clutches, of which thefollowing isa specification.

My invention relates-to certain new and useful improvements in clutches, and the object of my invention is to provide a clutch which will rst operate 'as a friction clutch, and then become a positive clutch.

A further objectv of myy invention is to provide a clutch of this character which shall be simple, durable and highly efficient,

composed of few parts and not likely View my inventionconsists in certain construct-ions, combinations and arrangements of parts, the preferred-form of which will berfirst described in connect-ion with the accompanying drawings, and then the invention particularly pointed out in the appended claim. I

Referring to the drawings wherein the same part is designated by the same reference numeral wherever it occurs, Figure 1 isa central longitudinal section of the preferred embodiment of my invention; Fig. 2 is a section taken on line 2, 2 of Fig. land looking in the direction of the arrow Fig. 3 is a sect-ion taken on line 3, 3 of Fig. 2, and Fig. 4 is a top plan view of the construction shown in Fig. 1.

5 designates a shaft and 6 a drum loosely mounted on said shaft, said drum being provided with a face portion 8 to which vmay be bolted a gear or other part to be yforced the two halves 11 of a friction ring.

Adjacent each end of each half ring 11 .are provided ears 12, 13, whereby a palr of ears 12, 12, and a second pair of ears 13, 13 are opposed to each other, on opposite sides of the friction ring. The pairs of ears 12, 12 are connected together by a pair of toggle arms 14, 14, pivoted in the ears by the piv-l ots 15. and pivoted together by the pivot 16.

The pairs of ears 13, 13 are similarly Aconnected together b y a pair of toggle arms 17, pivoted in the ears by the pivot pins 18, 18, and pivoted together by the pivot pin 19.

20 designates a sleeve keyed fast on the shaft 5 and extending within the drum.A

which are pivoted the levers 24, 24, the inner ends of the levers being connected to the pivot pins 16, 19 of the toggles by the links 25, 25, which are pivoted at one end onto the pins 16 and 19, andat the other end on the pivot 26,\26, carried by the lever 24. The outer end of each lever 24 extends through an opening 27, 27, in the diskv22, and is in position to be engaged by the end of a set screw 28, 28, carried by a lever 29, 29, pivotally mounted on the pivot 30, 30,

supported in the ears 31, 31, formed on the rear end of the sleeve. From this con- .struction it will be seen that when the levers 2.9, 29 areoperated to force the ends of the adjusting screws against the levers 24, 24 these last-mentioned levers will operate through the toggles 14, 14 and 17, 17 to expand the ring 11 against the inner surface of the flange 10. In order to operate the levers 29, 29 I have provided a sliding colvlar 31, feathered on the shaft 5, and having wedgel portions 32, 32, adapted to contact with anti-friction wheels 33, 33, carried in the ends of the levers 29. In order to slide the collar 31 I have shown it as provided with a groove 34 into which extends a pair of pins 35, 35, carried by a fork of an operating lever, indicated at 36. The collar 31 is also provided with a pair of oppositely .extending arms 50, terminating in squaredbosses 51, which engage the cutaway portion 52 formed on the inner side of each half of the split ring. By this construction it will be seen that when the ringis in engagement with the drum that the driving strain will be transmitted through the bosses 51 to the shaft 5, instead of through the toggles 14, l

between the two parts of the clutch after the l l@ l friction ring has been expanded the maximum amountI provide a pair of ears 37, 37, one in each of the arms 50, mounted on p-` posite sides of thecellar 31, and between the` inclined portions 32. Extending through openings formed in the ears are a pair of pins 38, 38, Aeach pin being formed withal head 39 adapted to contact with the ear', and

on the opposite side witha collar 40, be-

tween which and the ear 37, is confined a coil spring 41 surrounding the pin. Beyond the collar 40 each pin extends through a guide 42 formed on the. sleeve 20, and extending through the disk 22, as best shown in Fig.y 3. The inner end of each pin is preferably tapered as shown at 43. The portion 8 of theA drum is provided with bonical openings 44 in which, under certain conditions, the conical ends 43 of the pins are adapted to enter.

The position of the clutch shown in the drawings is that in which the sleeve 31 has been moved just suicient to bring the halves of the friction ring in contact with the flange .of the drum, and it is to be noted that the ends of the pins are such a distance away Afrom the innerk surface of the face portion 8 of the drum that the ends of the pins will not contact with-the inner face until the rollers 33 of the levers 29, 29 have reached the topl of the incline or wedge portion 32 of the sleeve. In this position the maximum frictional effect of the friction ring on the drum is 'given. To completely throw the clutch'however the sleeve 31 is moved until the roller 32-has ridden across the flat upper portion thereof, which latter movement will drivel the ends of the pins against the inner surface of the face plate 8 and compress the springs 41. Should the clutch now slip the pins and face plate will rotate in relation to each other until the pins come in `register with the openings 44, when the force of the coil springs will drive them into the openings and thus positively lock the two parts of the' clutch together. When the sleeve 31 is moved in the opposite direction to release the clutch theA engagement' of ,the ears 37 with the heads 39 of the pins will withdraw themfrom engagement with the openings 44, before the toggles forcing `the friction ring been'broken.

I amaware that considerable variation is possible inthe details ofv construction herein shownk and described, without departing from the spiritjof my invention, and I do not intend to limit myself thereto, except as pointed out. in the following claim,,in` which itis my intention to claim all .the novelty inherent in the structure shown and described as broadly as the state of the art'will permit.

'Havingthus described my invention what I claimv as new anddesire to secure by Letters Patent In a clutehmechanism, 1n combination, a

50 into enga-gement with the flange will have.

shaft, a driving member and a driven meinbermounted thereonone coactiv'ely fitting within the other, and comprising an expansiblesplit frictionriiig, toggles between the adjacent .endsy of `the parts of said ring adapted to move to extended 'position to expand the ring, a series of levers of the first order connected with each toggle, means for adjustingone lever of each series with re'- spect to another, cam means for simultaneously actuating said'series of levers, means independent of said toggles and levers adapted to transmit motion from the driving to the driven member, means associated with one of said members and coacting with the other adapted to lock said .members in clutched relation after said ring has been completely expanded by said tog le, and an anti-friction device separating 51e driving and driven members.

' In testimony whereof I afix my signature in presence'of two witnesses.

ALBERT L. HALLBAUER.

Witnesses:

JOHN BUCKLE, Marcus E. SPERRY. 

